I have just purchased a gently used 1500, took it out before even bench testing it and found 2 pieces of gold jewlery. (Showed up in the nickel range) I was quite impressed. Bench testing it later, the target ID was pretty good, depth was very good. Here's my question...when bench testing say a quarter, target ID, size and depth was right on, however when the quarter was say 10 inches away from the coil the ID changed, and the size ID said it was a big target. When I had stopped at a local park after purchasing this unit. I had hit a couple of targets that were over 10 inches deep, but the size was soda can big and did not dig them. Wonder if these could have been old coins now. Any 1500 users experience this?